1 /* SPDX-License-Identifier: LGPL-2.1 */ 2 /* 3 * 4 * Copyright (c) International Business Machines Corp., 2007 5 * Author(s): Steve French (sfrench@us.ibm.com) 6 * 7 */ 8 9 #ifndef _CIFSACL_H 10 #define _CIFSACL_H 11 12 #include "../common/smbacl.h" 13 14 #define READ_BIT 0x4 15 #define WRITE_BIT 0x2 16 #define EXEC_BIT 0x1 17 18 #define ACL_OWNER_MASK 0700 19 #define ACL_GROUP_MASK 0070 20 #define ACL_EVERYONE_MASK 0007 21 22 #define UBITSHIFT 6 23 #define GBITSHIFT 3 24 25 /* 26 * Security Descriptor length containing DACL with 3 ACEs (one each for 27 * owner, group and world). 28 */ 29 #define DEFAULT_SEC_DESC_LEN (sizeof(struct smb_ntsd) + \ 30 sizeof(struct smb_acl) + \ 31 (sizeof(struct smb_ace) * 4)) 32 33 /* 34 * The current SMB3 form of security descriptor is similar to what was used for 35 * cifs (see above) but some fields are split, and fields in the struct below 36 * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and 37 * 2.4.6). Note that "CamelCase" fields are used in this struct in order to 38 * match the MS-DTYP and MS-SMB2 specs which define the wire format. 39 */ 40 struct smb3_sd { 41 __u8 Revision; /* revision level, MUST be one */ 42 __u8 Sbz1; /* only meaningful if 'RM' flag set below */ 43 __le16 Control; 44 __le32 OffsetOwner; 45 __le32 OffsetGroup; 46 __le32 OffsetSacl; 47 __le32 OffsetDacl; 48 } __packed; 49 50 /* Meaning of 'Control' field flags */ 51 #define ACL_CONTROL_SR 0x8000 /* Self relative */ 52 #define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */ 53 #define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */ 54 #define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */ 55 #define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */ 56 #define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */ 57 #define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */ 58 #define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritence */ 59 #define ACL_CONTROL_SS 0x0080 /* Create server ACL */ 60 #define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */ 61 #define ACL_CONTROL_SD 0x0020 /* SACL defaulted */ 62 #define ACL_CONTROL_SP 0x0010 /* SACL is present on object */ 63 #define ACL_CONTROL_DD 0x0008 /* DACL defaulted */ 64 #define ACL_CONTROL_DP 0x0004 /* DACL is present on object */ 65 #define ACL_CONTROL_GD 0x0002 /* Group was defaulted */ 66 #define ACL_CONTROL_OD 0x0001 /* User was defaulted */ 67 68 /* Meaning of AclRevision flags */ 69 #define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */ 70 #define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */ 71 72 struct smb3_acl { 73 u8 AclRevision; /* revision level */ 74 u8 Sbz1; /* MBZ */ 75 __le16 AclSize; 76 __le16 AceCount; 77 __le16 Sbz2; /* MBZ */ 78 } __packed; 79 80 /* 81 * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid 82 * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx 83 */ 84 struct owner_sid { 85 u8 Revision; 86 u8 NumAuth; 87 u8 Authority[6]; 88 __le32 SubAuthorities[3]; 89 } __packed; 90 91 struct owner_group_sids { 92 struct owner_sid owner; 93 struct owner_sid group; 94 } __packed; 95 96 /* 97 * Minimum security identifier can be one for system defined Users 98 * and Groups such as NULL SID and World or Built-in accounts such 99 * as Administrator and Guest and consists of 100 * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority) 101 */ 102 #define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */ 103 104 /* 105 * Minimum security descriptor can be one without any SACL and DACL and can 106 * consist of revision, type, and two sids of minimum size for owner and group 107 */ 108 #define MIN_SEC_DESC_LEN (sizeof(struct smb_ntsd) + (2 * MIN_SID_LEN)) 109 110 #endif /* _CIFSACL_H */ 111